Air suction and force pump.



P. 0. DE HYMBL.

I AIR SUCTION AND FORGE PUMP. APPLICATION FILED 00T.10, 1912.

1,074,608. Patented 0011.7, 1913.

WITNE88E8 "WEI/TOR fXFWA/KA //v 0. DE/fi MEL Y 87M A TTORIVEYS' FRANKLIN 0. DE HYMEL, OF SAN ANTONIO, TEXAS.

AIR SUCTION AND FORCE PUMP.

Specification of Letters Patent.

Patented Oct. 7, 1913.

Applicationfiled October 10, 191-2. Serial No. 7245937.

To all whom it may concern:

Be it known that I, FRANKLIN 0. DE HYMEL, a citizen of the United States, and a resident of San Antonio, in the county of Bexar and State of Texas, have invented an Improvement. in Air Suction and Force Pumps, of which the following is a specification.

In my application for patent, Serial No. 697,183, I disclosed a completeapparatus, namely, a combined pneumatic lift-andforce pump for raising water from wells, the same being particularly intended and adapted for service in arid regions in the western portion of the United States or the Great Central Valley of Mexico. Such apparatus includes as a necessary and prominent feature an air-pump cylinder having a reciprocating piston, and.possessing certain novel and advantageous features of construction and combination of parts. Such cylinder forms the subject of the present application and the novel features referred to are hereinafter described and claimed and duly illustrated in the accompanying drawing, in which Figure l'is a diagrammatic plan view of my improved air pump, together with a 'series. of pneumatic water lifts applied in a series of wells and all connected with each other and the air pump proper. Fig. 2 is an elevation of my improved air-pump cylinder, together with the upper portion of the pneumatic lift-and-force apparatus with which it is employed in practice. Fig. 3 is a central longitudinal section of my improved air-pump.

In the several figures, A indicates the cylinder of my air-suction and force pump, and in Fig. 2 the same is shown provided at its ends with'pipes 1 which, in practice,

extend to, and are connected with, apparatus B, such apparatus being installed in a well, as will-be understood by reference to Fig. 1, where series of such apparatus are shown in a series of wells, the pipes 1 before referred to extending to and connecting the individuals of the respective series. The apparatus 13 constitutes the pneumatic wator-lift proper before referred to and which is the subject of my aforesaid application,

. Serial No. 697,183, to which reference may be made for a complete understandin of the operation of the invention as a who e.

' The cylinder A is provided with a piston 2 having a rod 3 which extends through one head of the cylinder, and is in practice connected with gearing adapted to :be operated by a draft animal, or by a motor, as conditions may favor. The cylinder is, in practice, mounted upon a truck adapted for attachment of a draft animal, for convenience of hauling from one point to another where irrigation is required. The truck is shown in plan view in Fig. 1. The cylinder A is provided on the under side with a series of openings, two of which are closed by plugs 4 and the middle one provided with an air inlet valve 5,

It will be seen that when the piston is re ciprocated, air is drawn in through one of the pipes 1 and is expelled through the other, so that a vacuum is created in one case and air expelled in the other. The effect of this upon the apparatus B located in a well need not be described here.

It will be seen that each time the piston 2 passes the air-inlet valve 5, suction ceases, while compression of air and expulsion of the same from the cylinder A continues until the piston reaches the end of its stroke. In other words, suppose the piston to be at one end of the cylinder, and it moves toward the other end, suction Will exist in the cylinder until the piston shall have passed the valve 5, during which time water will have been raised in the apparatus B, but when the piston passes the valve, the partial vacuum in the right hand end of the cylinder will be filled by air rushing in, as indicated by arrows, so that the water lift orsuction will be arrested. The piston, however, in com pleting its stroke, continues to compress the air and force it out of the cylinder. To sum up the matter, the compression and expulsive air-stroke of the piston is twice or more times the length of the suction or liftstroke, which is a matter of much importance in raising water to a considerable height or forcing it to a considerable distance.

The openings in the cylinder A whichare shown closed by removable and interchangeable plugs {1, provide for attachment of other air-inlet valves which may be located at different distances from the ends of the cylinder, as conditions require, so that air may be admitted and suction cut off at different points in the stroke of the piston according to the distance or height to which water is to be driven or raised. Thus, by locating a single air-inlet valve centrally,

or by locating tWo valves nearer the ends of the cylinder A, at points between the middle and ends, I am enabled to secure a variation in expulsive eflect as Well as in suction or lift. I therefore propose to arrange the valves in one Way or the other according to requirements, particularly accordin to the height or distance to which water Is to be elevated in and discharged from the appara- 10 tus B.

What I claim is In an apparatus for the purpose specified,

the air-pump comprising a reciprocating piston and a cylinder having its under side provided with a series of openings, and interchangeable screw plugs and airinlet valves adapted to be secured in said openings for regulating air vacuum and compression, as described.

FRANKLIN 0. DE HYMEL.

Witnesses:

GEO. CAEN, Jr., ALEXANDER CAMPBELL. 

